1. Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Institute for Global Change Studies, Tsinghua University, Beijing, China
2. Kingsoft Office Software, Jinshan Software Park, Zhuhai, China
3. State Key Laboratory of Marine Resource Utilization in South China Sea and the School of Information and Communication Engineering, Hainan University, Haikou, China
4. Department of Information Science and Engineering, Ocean University of China, Qingdao, China
5. School of Information Science and Technology, Nantong University, Nantong, China
6. Department of Computer Science, Norwegian University of Science and Technology, Gjøvik, Norway